If you are looking for an outcall escort (an escort who visits you), then it is probably not worth while looking at smaller areas. The selection will be smaller, and you might miss someone more suitable. It is likely the escort will travel through the London borough you are in. When looking for an incall escort (you visit them), then you will need to look to the areas you want to visit. Maybe it is near your office, or on the walk back to the rail station.